Photo: Annick Bregain · CC BY-SA 4.0Château-Thierry sits above 94% of compared French towns for one-person households (51%)
Set against 6.7% in the typical compared French town, one in ten homes stand empty in Château-Thierry. On flats, Château-Thierry sits higher than 86% of compared French towns: 64%. At the 2023 Census, 15,097 people lived locally, in 7,340 households. Households without a car: 28% of the total.
Throughout this page, the Aisne median and the France median are the median of compared communes (those with an overall grade), each figure its own median. Source: INSEE, census 2023.
What stands out about the people of Château-Thierry
Many people living alone
51% of Château-Thierry’s households are one person: higher than in 94% of compared French towns; 46% of residents 65 and over live alone. Households ↓
Immigrants
INSEE counts 2,500 immigrants in Château-Thierry (people born abroad who weren’t French at birth, whatever their nationality now): 16% of residents, against 5.7% for the median compared commune in Aisne. 15% are foreign nationals. Immigrants and foreign nationals ↓
Social housing
32% of households rent from a social landlord (HLM), 29% rent privately and 38% own their home. Homes & cars ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
A +5% change since 2012: Château-Thierry grew faster than 52% of compared French towns
Residents at INSEE’s last three censuses, each recast in the 2026 commune boundaries. France has no yearly estimate by commune between censuses.
2012 to 2023
2017 to 2023
A median age of 41.3: Château-Thierry is younger than 71% of compared French towns
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Château-Thierry 41.3. The median compared French town: 44.
In Château-Thierry, just over one in ten residents are 15 to 24, beside 11% in the typical compared French town. Locally, just over a fifth of residents are 65 or over.
Women and men · all residents
53% women, 47% men
About 88 men for every 100 women. Median share of women: Aisne 52.5%, France 51.8%.
A smaller share of couples with children than 82% of compared French towns: 18%
A household is everyone who shares a main home (résidence principale). Household types come from INSEE’s fuller sample of a quarter of census forms.
Against the Aisne median and the France median
Living alone · share
With single-parent households at 13%, Château-Thierry is ahead of 89% of compared French towns on that count. A household here holds 2 people on average. To put it in context, a quarter of households are couples with children in the typical compared French town.
In Château-Thierry, 32% of households rent social housing (HLM), more than in 94% of compared French towns
Every home the census counted: main residences, second homes and occasional dwellings (INSEE counts them together), and empty homes. Owning and renting are on Cost of living.
All homes · share of homes
Type of home
Cars per household · share of households
Long tenure is the mark of 14% of households (30 years or more), short tenure of 12% (under two years). Second homes: 2.4%, near enough the figure in the typical compared French town.
Half above, half below €20,900 a year in standard of living
The standard of living (niveau de vie) is a household’s disposable income after taxes and benefits, divided by its consumption units (UC) to allow for its size and make-up: 1 for the first adult, 0.5 for each other person 14 or older, 0.3 for each child under 14.
Medians of compared communes. Source: INSEE, Filosofi 2023.
Living standards centre on €20,900 a year per consumption unit: lower than in 94% of compared French towns. Residents below the poverty line make up 29.0%.
More households headed by a manual worker than 75% of compared French towns: 18%
Households by the socio-professional group (PCS) of their reference person, INSEE’s own categories. Jobs and commuting are on the Work & commute page.
Households by reference person’s group · share of households
The share of households headed by a manager or professional is 8.2%, against 9.4% in the typical compared French town. Set beside that, 14% of households are headed by a manual worker in the typical compared French town. Households headed by a retired person: a third of the total.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
16% of residents are immigrants, more than in 88% of compared French towns
INSEE publishes two measures, which overlap but aren’t the same. Neither is the UK’s “born abroad”.
Share of residents · census 2023
Immigrant (immigré)
Born abroad, not French at birth. Someone stays an immigrant after becoming French. A French citizen born abroad (for example in Algeria before 1962) is not one.
Foreign national (étranger)
Not a French citizen today, wherever born. A child born in France to foreign parents can be a foreign national without being an immigrant.
Set against 4.3% in the typical compared French town, 15% of residents are foreign nationals in Château-Thierry. Immigrants make up 6.5% in the typical compared French town.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Château-Thierry ranks below 91% of compared French towns on married residents: 35%
Residents 15 and over by how they live: the census asks both the legal status and whether people live as a couple.
Residents 15 and over · share
Where a quarter of residents 15 and over are single in the typical compared French town, Château-Thierry has 34%. Married residents: 43% in the typical compared French town, for comparison.
Château-Thierry sits above 96% of compared French towns for adults with no qualification (33%)
Highest diploma of residents 15 and over who have left education, in French terms: the levels don’t map one-to-one to UK or U.S. ones.
Highest diploma · 15 and over, out of education
30% of adults out of school hold a higher-education qualification in the typical compared French town, against 22% in Château-Thierry. Set beside that, nearly a fifth of adults out of school have no qualification in the typical compared French town.
The 19th youngest of 41 French towns of 14,718 to 15,554 people
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
Lognes is the youngest (34.9); Saint-Jean-de-Luz the oldest (54.3).
Around Château-Thierry, 5 of 6 towns have a higher median age
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Château-Thierry | 41.3 | 22% | 2.4% | 16% |
| Essômes-sur-Marne 2,691 · 2 mi | 44.5 | 21% | 2.3% | 9.6% |
| Charly-sur-Marne 2,594 · 7.1 mi | 42.1 | 22% | 3.3% | 10% |
| Dormans 2,890 · 11.4 mi | 48.9 | 28% | 3.7% | 4.9% |
| Fère-en-Tardenois 2,836 · 11.6 mi | 47.8 | 28% | 1.9% | 3.3% |
| La Ferté-sous-Jouarre 10,254 · 13.8 mi | 39 | 17% | 2.5% | 20% |
| Montmirail 3,535 · 14 mi | 51.3 | 32% | 3.4% | 5.2% |
Health, work, housing and schools
What this data can and can’t tell you
- Census 2023. INSEE’s census is a rolling survey: a fifth of small communes each year, 8% of homes in large ones each year. “2023” pools the surveys of 2021 to 2025, so the figures describe the town around 2023, not on one day.
- Medians of compared communes. The comparisons are the median of the département’s compared communes and of France’s (those with an overall grade), each figure its own median: not the total for the département or for France, which large cities pull towards their own figures.
- Immigrants and foreign nationals. INSEE’s two measures: an immigrant was born abroad without French nationality; a foreign national isn’t French today. Neither is a count of people born abroad, which INSEE doesn’t publish by commune.
- Second homes. Homes used for holidays or weekends, with occasional dwellings (kept for work, for example), which INSEE counts together. Their owners are counted where they live, not here.
- Standard of living. INSEE’s Filosofi: disposable income per consumption unit, from tax and benefit files, 2023. The poverty rate is the share of residents below 60% of France’s median. Not published for the smallest communes.
- What France doesn’t ask. The French census asks nothing about ethnicity, religion, language or health, so this page has no such section.
Questions about who lives in Château-Thierry
What is the population of Château-Thierry?
15,097 at INSEE’s 2023 census, 5% more than in 2012 (14,329).
How old are Château-Thierry’s residents?
The median age is 41.3, younger than 71% of compared French towns. 23% are under 18 and 22% 65 or older.
How many second homes are there in Château-Thierry?
200, with occasional dwellings: 2.4% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Château-Thierry?
INSEE counts 2,490 immigrants (born abroad, not French at birth), 16% of residents, and 2,310 foreign nationals (15%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Château-Thierry?
€20,900 a year per consumption unit in 2023 (median of compared French towns €25,970); 29.0% of residents live below the poverty line. Source: INSEE, Filosofi.
Sources: INSEE, census 2023 (population, ages, households, homes, marital status, diplomas, immigrants, foreign nationals, employment), 2026 geography · INSEE, Filosofi 2023 (standard of living, poverty) · IGN Admin Express (boundaries) · Medians and percentiles: TownRatings, over compared French towns, updated November 9, 2026. Under the Licence Ouverte / Open Licence 2.0 (Etalab).
Contains public sector information under the Licence Ouverte / Open Licence 2.0 (Etalab): INSEE, DGFiP, the Interior Ministry’s statistics service (SSMSI), the Ministry of Education (DEPP), the Health Ministry’s statistics service (DREES) and the Housing Ministry (Carte des loyers). Commune boundaries: IGN Admin Express.